868 results about "Barium chloride" patented technology

The invention discloses an ultralow-mercury catalyst. The ultralow-mercury catalyst is prepared by taking the wooden activated carbon with carbon tetrachloride adsorption rate of being greater than or equal to 70 percent, an iodine value of being greater than or equal to 1,000 mg/g, moisture of being less than or equal to 5 percent, ash content of being less than or equal to 7 percent, mechanical strength of being greater than or equal to 95 percent, stacking density of being 360-420 g/l, particle size of being 2.5-4.0 mm and specific surface area of being 1,000-1,800 m<2>/g as a carrier and adsorbing mercury chloride and collaborative promoters of zinc chloride, barium chloride, potassium chloride and bismuth chloride at a central position, wherein the content of the mercury chloride is only 0.5-4.0 percent; but since the mercury chloride occupies the central position with stronger activated carbon adsorption capacity and reaction activity and the added active ingredient bismuth chloride and the adopted activated carbon are the wooden activated carbon with ultrahigh voidage, and meanwhile the collaborative promoters are also added to realize great collaborative effect of the activated carbon and the mercury chloride, the catalyst has longer service life and higher activity.

The invention provides a molybdenum phosphide catalyst for the production of chloroethylene by acetylene hydrochlorination, which is characterized in that: the catalyst uses activated carbon as carrier, MoP as active ingredient and barium chloride as auxiliary. The catalyst provided by the invention belongs to mercury-free catalyst, is green and environmentally-friendly, and has the advantages ofsimple production process, short production period, low cost and the like. The catalyst exhibits superior activity and selectivity in the reaction for preparing chloroethylene by acetylene hydrochlorination.

A refining agent of Mg-alloy contains magnesium chloride (40-60%), potassium chloride (10-25%), sodium chloride (10-25%), calcium chloride (1-10%), calcium fluoride (5-15%), barium chloride (1-10%), nano carbonate adsorbent (1-10%) and rare-earth compound as hidrogen-fixing agent (1-10%). Its advantages include high activity, high effect on fixating hydrogen, removing impurities, and improving mechanical and anticorrosion performance, and high chemical stability.

The preparation method of barium titanate (BaTiO3) includes the following steps: using titanium tetrafluoride and barium chloride or barium hydroxide as main raw material to prepare precursor body slurry liquor, then adding organic additive according to a certain ratio, placing them into reaction still to make hydrothermal reaction so as to obtain the invented product BaTiO3 powder body whose grain size is 20-200 nm. Said invented advantage lies in that it utilizes the regulation of class of organic additive and reaction condition to can regulate grain size distribution of product and make its product possess good grain uniformity, high sintering activity, high material property and chemical activity, and said method is easy to implement large-scale industrial production.

The invention provides a retardation method for alkali-activated-carbonate/slag gel material which comprises, at normal temperature, calculated by mass portions, dissolving 4-10 portions of barium chloride or barium nitrate into 100 portions of water, thus obtaining retarder solution, then charging 200-300 parts of slag powder, agitating homogeneously, charging in turn 220-3100 parts of exciting agent, 200-3800 parts of marginal carbonate powdered ore, agitating homogeneously, finally obtaining the end product.

The present invention relates to a metal surface salt bath nitride nitriding heat treatment method which belongs to the metal part surface heat treatment technology field. The method is performed in the following technical process: first, loading and clamping: the metal part is hung and arranged in a charging basket; second, nitriding: the metal part hung and arranged in the charging basket is positioned in a nitriding furnace, heated and charged with nitriding salt for salt bath and nitriding, and heat is preserved for 30-80 minutes in the condition that the temperature is 540-570 DEG C; third, cleaning: the nitrided metal part is cleaned, and the water temperature is controlled at 60-80 DEG C; the nitriding salt in the nitriding working process comprises carbamide, potassium chloride or barium chloride, sodium carbonate, and K ₂ S, etc., according to the weight percentage, the composition of each component is respectively: 30-40 percent of carbamide, 20-28 percent of potassium chloride or barium chloride, 38-44 percent of sodium carbonate, and 0.0001-0.1 percent of K ₂ S, and the sum of the weight percentage of each component is 100 percent. The present invention has the advantages of smaller deformability, short time, high efficiency, and wide application range; and also can achieve the effect of reducing the cost obviously.

The feature of the invention includes: adopting frozen chicken gallbladder slicing, heating to 70 degree centigrade, adding 10% weight of the bile boiling for 24 hours, reflux cooling, adjusting the pH value by hydrochloric acid to gain cream, washing to neutrality; adding 95% alcohol and 10% diatomite, reflux cooling and adding active carbon, reflux, cooling and filtering, adding petrol to the filtrate to take degreasing, reflux, standing, separating alcohol liquid and washing to neutrality in reaction kettle, adding 95% alcohol, after resolving, adding barium chloride and active carbon, reflux, hot filtering, concentrating white crystal from the filtrate, washing, and adding water and sodium carbonate water solution, heating and reflux, filtering, adjusting the pH value, drying. The invention has simple technology, low cost, and could drastically separate cholesterol, lithocholic acid, and cholic acid from gall, and improves the purity.

The invention discloses a manufacturing method of calcium chloride through industrial waste carbide slag, which comprises the following steps: adding 20-40% industrial alcaine in the autoclave; adding carbide slag to react; controlling reacting temperature at 40-95 deg.c; terminating the reaction when the pH value is 5-8; filtering the product; adding activated carbon to discolor; adding barium chloride to remove sulfate ion; filtering; condensing the filtrate; crystallizing; drying to obtain calcium chloride.

The present invention relates to method of preparing nanometer grade tetragonal phase barium titanate powder. Said method uses low price barium chloride, titanium tetrachloride as barium, titanium source for hydrothermal reaction and uses sodium hydroxide as mineralization agent. Prepare high concentration barium chloride solution and titanium tetrachloride solution respectively then mix together, add in sodium hydroxide to form colloidal sol with very good fluidity as hydrothermal reaction mixture which is put in high pressure anticorrosion reactor and raise temperature to 240 deg.C, maintain this temperature for 12hr., filter, wash with deionized water., dry to obtain monodispersional nanometer grade tetragonal phase barium titanate powder with average size smaller than 100 nm.

The invention discloses a copper phosphide catalyst for synthesizing chloroethylene, which is characterized in that the carrier of the catalyst is active carbon, the active component is Cu3P and the auxiliaries comprise one or more of copper chloride, nickel chloride and barium chloride. The catalyst disclosed by the invention is green, simple in production process and short in production period and shows excellent activity and selectivity in the reaction of synthesizing chloroethylene via the hydrochlorination of acetylene.

The invention provides a composite copper-based catalyst, a preparation method and an application thereof in the production of vinyl chloride. The preparation method of the composite copper-based catalyst includes the following steps: soaking acid-treated activated carbon in a solution containing copper salt and an auxiliary agent, and drying and roasting to obtain the composite copper-based catalyst, wherein the auxiliary agent is one or more of ferric chloride, cerium chloride, tin chloride, barium chloride, manganese chloride, zinc chloride, cobalt chloride, lanthanum chloride, nickel chloride, bismuth chloride and potassium chloride; and the mass ratio of the acid-treated activated carbon, the copper salt and the auxiliary agent is 100: 5: 1-100: 10: 5. The catalyst is environment-friendly, low in cost, simple in process and short in production period. The catalyst shows high activity, selectivity and good stability in the reaction of hydrochlorination of acetylene to produce the vinyl chloride, and is expected to be a good substitute for a mercury catalyst.

A deironing boride flux for Mg-alloy contains magnesium chloride, potassium chloride, sodium chloride, calcium chloride, calcium fluoride, barium chloride, and boron oxide and/or sodium borate as deironing agent. Its advantages are high power removing impurities and Fe from molten Mg-alloy, easy separation, and low cost.

The invention belongs to the chemical field of inorganic salts, in particular to a preparation method of high-purity anhydrous lithium chloride; wherein, sodium hydroxide and barium chloride are added into the high-potassium sodium brine containing lithium chloride which is used as a raw material; the mixture is stirred and filtered to eliminate a great amount of Mg 2 <+> and SO 4 <2->; and the micro Mg 2 <+> and the SO 4 <2-> can be eliminated by adding sodium carbonate into the mixture, and then is filtered to get a refined mother liquid. The refined mother liquid can be evaporated and filtered to eliminate potassium chloride and sodium chloride; and high-potassium mixed salt containing 60 to 95 percent of lithium chloride can be achieved by spraying and drying the refined mother liquid. After adding low-carbon organic solvent, the high-potassium mixed salt is stirred to extract lithium chloride and filtered to eliminate potassium sodium salt. High-purity anhydrous lithium chloride with the purity of over 99.5 percent can be achieved by depressurizing and distilling the mother liquid. The invention is applicable to the extraction art of the lithium chloride used in all present low-magnesium salt lakes containing lithium, and the extraction process of the lithium chloride from the mother liquid achieved after pressing solid lithium ore. The invention not only has the advantages of simple process and low cost, but also is easy to be operated and used in industrialization and has no three-waste pollution.

The invention discloses a method for treating chromium-containing wastewater by using barite adsorbent. The method comprises the following steps of: fusing, crushing and screening a barite mineral material, reacting the barite mineral material by using ferric chloride solution to generate the barite adsorbent for removing chromium ions from sewage containing 50 to 150 mg/L of chromium compound, and shaking the barite adsorbent for 1 hour in a 20 DEG C water bath thermostatic oscillator when the pH is 3 to 4, wherein the removal rate of the chromium ions in the sewage is over 99 percent; and adding a proper amount of barium chloride powder into the barite adsorbent for treating the high chromium content sewage so as to improve the removal rate of the chromium ions. The method has the advantages that: the barite is a most common barium-rich sulfate mineral, the globe surface has rich resources and the cost is low, so the method is convenient for popularization and application; and the barite adsorbent has simple preparation process, convenient operation and high adsorption rate of the chromium ions in the wastewater, can be repeatedly regenerated and recycled, and meets the energy conservation and emission reduction requirements.

The invention discloses a method for preparing anhydrous lithium chloride by lithium-containing liquid waste. The lithium-containing liquid waste at least contains lithium ions, calcium ions, magnesium ions, sodium ions, potassium ions, sulfate ions and chloride ions. The method comprises the following steps of: (A) adding hydrogen peroxide to the lithium-containing liquid waste. To remove a residual organic phase; (B) adding a barium chloride solution and filtering the solution after reacting to obtain a mother liquid; (C) adding a sodium carbonate solution to the mother liquid and filtering the solution after reacting to obtain a refined mother liquid; (D) evaporating and concentrating the refined mother liquid until sodium chloride and potassium chloride solids are separated out, carrying out filtration to remove the sodium chloride and potassium chloride solids to obtain a lithium chloride clean liquid; (E) adding a sodium refining agent to the lithium chloride clean liquid, carrying out stirred reaction and then filtering the solution to obtain a high-concentrate lithium chloride solution; and (F) drying the high-concentrate lithium chloride solution and then obtaining anhydrous lithium chloride. The method is simple in technology, low in production cost, high in lithium recovery rate and friendly to environment.

The invention discloses a method for measuring sulfate ions in a scaled component of a water vapor system in a power station, which overcomes the problems that the error of sulfate ion content is big because of the high content of iron ions, the linearity of test working curve is unsatisfactory, the data repeatability is poor, and the linear correlation coefficient r is difficult to reach 0.999. Besides, the invention perfects the test method to ensure that test data is accurate and reliable. The method comprises the following steps: taking a sulfate working solution; diluting the sulfate working solution; adding a condition agent into the solution, and then adding a barium chloride to enable the solution mixture to react and generate barium sulfate sediment; measuring the absorbance A, wherein blank absorbance A0 with the content of sulfate being 0 is deducted from the absorbance A to acquire absorbance (A-A0); drawing a curve according to the smooth curve relationship between the absorbance (A-A0) and the sulfate ion content m (within the range of 0-1.5mg); within the range, establishing a linear regression equation; taking a scaled sample to be measured, and preparing into a solution to be measured; measuring the A0 and A; substituting the A0 and A into the linear regression equation or checking the working curve, thereby acquiring the sulfate ion content; and finally, calculating the sulfuric anhydride content in the scaled sample to be measured.

The invention relates to a method of distilling the chenodeoxychoilc acid from the offcuts which be gained by distilling the bilirubin from the bile of the pig. With the offcuts of the alkali saponification, the deposit is treated with the oxidation treatment by means of the hydrogen peroxide, the filtrate is treated by the dilute sulfuric acid and decolored by means of the active carbon and solved, crystaled using the ethyl acetate again and again; the coordinate production of the hyodeoxycholic acid is purified, the mother liquor is concentrated to the cream and melted using the alkali and have the salifying treatment with the chloride of barium, so the cholate is formed, the cholate is treated to take off barium when the cholate suspending the aqueous solution containing the sodium carbonate, then it is acidificated with the dilute sulfuric acid and is separated ,deposited and dried to gain the crude chenodeoxycholic acid which is decolored using the active carbon and is melted, rimed and dried using the ethyl acetate. Then the finished production of the chenodeoxycholic acid form.The whole technics has some merits of the abundant material, the amity of the environment, the safety and innocuity, producing many outputs from the single stuff and easy to the mass production. The invention is used for distilling the chenodeoxycholic acid.

The invention provides a method for selenizing pilose asiabell root polysaccharides. The method comprises the following steps of: adding selenous acid into an aqueous solution of the pilose asiabell root polysaccharides with stirring, adding a catalyst, reacting at the temperature of between 50 and 70 DEG C for 4 to 8 hours, cooling, separating, and purifying to obtain a selenized pilose asiabell root polysaccharide product, wherein the catalyst is barium chloride. By the method, the content of selenium in the pilose asiabell root polysaccharides can be improved to 500-5,000mu g/g, the anti-tumor activity and immunity improving activity of the selenized pilose asiabell root polysaccharides are obviously improved compared with those of non-selenized pilose asiabell root polysaccharides, and the product can be used for preparing anti-tumor medicines or medicines or health care products for improving immunity.

The invention relates to a technique for synthesizing high-purity electronic grade barium titanate by a liquid phase method, which includes the following steps: oxalic acid is dissolved in deionized water, and barium chloride accounting for 2% of molar weight of oxalic acid is added in; the barium-titanium mixed solution is added into oxalic acid solution at the flow speed of 1.3-1.5m <3>/h for reaction; the obtained solid is put in a kiln for constant temperature calcination which lasts for 2-4 hours, then is taken out and processed by jet milling, placed in the kiln once more for secondary constant temperature calcination which lasts for 1-3 hours, and taken out for secondary jet milling and barium titanate powder is obtained finally. The barium titanate prepared by the invention has high purity, good dispersibility, uniform powder particle appearance and reasonable particle size. Therefore, the technique of the invention can solve the problem that the barium titanate powder prepared by the traditional method; more particularly, the existing coprecipitation method has sulphate impurities, severe glomeration, and the like, and can completely meet the requirements of the production of high-performance electronic components like base metal porcelain capacitors, etc.

Provided is a building material with a higher specific gravity and/or radioactive-ray-shielding function while maintaining a workability equivalent to that of a conventional gypsum board. It relates to a gypsum-based building material manufactured by adding water to a composition in which a base material is a combination of a hydraulic gypsum and one kind or two or more kinds of dry-hardening calcium carbonate or calcium hydroxide or synthetic resin emulsions and an inorganic filler with a high specific gravity is compounded to it so that reaction and setting or drying and setting are conducted, wherein the composition is characterized by comprising 100 parts by weight of at least one kind or two or more kinds of base materials selected from the group consisting of calcium sulfate, calcium carbonate, calcium hydroxide and organic synthetic resin emulsions, and 50-3,000 parts by weight of at least one kind or two or more kinds of inorganic fillers whose true specific gravity is 3.5-6.0 which are selected from the group consisting of barium chloride, zinc oxide, aluminum oxide, titanium oxide, barium oxide, strontium carbonate, barium carbonate, and barium sulfate.

Some waters have high sulfate contents, such as acid mine drainage (AMD), which makes them unsuitable for use in fracturing fluids and difficult to dispose. Such waters may be treated with a solution of barium chloride to react with the sulfate ion of the sulfates and precipitate the sulfates as barium sulfate. Not all of the sulfates needs to be removed for the reclaimed water to be useful in formulating a fracturing fluid. The by-product of the reaction is almost pure barium sulfate, which is an inert, commercially valuable material that may be used in drilling fluids, paint and other industries.

The invention discloses a printing and dyeing auxiliary, and relates to the technical field of spinning dyeing. The printing and dyeing auxiliary comprises, by weight, 10-15 parts of guar gum, 7-9.5 parts of poly alkyl acrylate, 15-20 parts of sodium carboxymethylcellulose, 5-8 parts of octadecyl dimethyl benzyl ammonium chloride, 2-3 parts of tannin and 10-15 parts of barium chloride. A preparing method comprises the steps that the raw materials are weighed according to the weight part, the poly alkyl acrylate, the sodium carboxymethylcellulose and the octadecyl dimethyl benzyl ammonium chloride are added into a reaction kettle to be heated and stirred until reaction is thorough, and cooling is carried out; the tannin and the barium chloride are added, stirred and heated, the guar gum is added, and stirring is even. The printing and dyeing auxiliary has the advantages of being high color fastness, good in color protecting performance and fading proof.